West Bengal Pollution Control Board |
Siliguri Laboratory |
Paribesh Bhawan, Paribahan Nagar, P.O. Matigara, Siliguri,Darjeeling 734 428. |
| Station: River Raidak at Alipurduar | River Basin: Tista | CPCB Station Code: 4728 |
| Sample Date: 15/09/2021 | Sample Time: 14:00 | |
| Human Activities: Fishing | Weather: Sunny and Clear. | Water Body: Raidak |
| Frequency Of Monitoring: Monthly | Use Based Class: B | Approximate Depth(Bottom/Table): 1.50 m |
| Color & Intensity: Dark Green and clear. | Odour: Fishy | Visible effluent discharge: None |
| Water Quality | ||
|---|---|---|
| Parameter | Test Result | Unit |
| BOD | 1.10 | mg/l |
| Ammonia-N | BDL | mg/l |
| Conductivity | 117.50 | µs/cm |
| Dissolved O2(DO) | 8.50 | mg/l |
| Fecal Coliform | 1700 | MPN/100ml |
| Fecal Streptococci | 14 | MPN/100ml |
| Nitrate-N | 0.06 | mg/l |
| pH | 7.32 | Unit |
| Temperature(Water) | 30 | ⁰C |
| Total Coliform | 5000 | MPN/100ml |
| Boron | 0.97 | mg/l |
| Calcium | 30.46 | mg/l |
| Chloride | 5.87 | mg/l |
| COD | 24.00 | mg/l |
| Fluoride | BDL | mg/l |
| Magnesium | 12.67 | mg/l |
| Phenolpthalein Alkanity | NIL | mg/l |
| Phosphate-P | 0.002 | mg/l |
| Potassium | 0.40 | mg/l |
| Sodium | 1.00 | mg/l |
| Sulphate | 4.50 | mg/l |
| Total Alkalinity | 96.00 | mg/l |
| Total Dissolved Solids(TDS) | 14.00 | mg/l |
| Total Fixed Solids(TFS) | 18.00 | mg/l |
| Total Hardness as CaCo3 | 118.00 | mg/l |
| Total Suspended Solids(TSS) | 14.00 | mg/l |
| Turbidity | 4.67 | NTU |